CLASSIFICATION OF ANIMALS. 215 



B. Ansbiingb [Invertebrata] . (120.) 



1. Malakia \_Cephalopoda]. (6.) 



2. Malakostraka \_Malacostraca] . (16.) 



3. Ostrakoderma \_Mollusca (other than Cephalopoda), 



Echinodermata, and Ascidia'\. (25.) 



4. Entoma [Insecta, Arachnida, and Chilognatha, chiefly] . 



(60.) 



5. Spongoi \^Spongidce] . (4.) 



6. Akalephae \_CoeIenterata'\. (2.) 



7. Anaima other than above [not classified] . (7.) 



A special interest is connected with the two main divisions, 

 viz., Enaima and Anaima, in the above scheme. The 

 distinction between them was used by many zoologists until 

 Lamarck and Cuvier used the almost equivalent terms, Ver- 

 tehrata and Invertehrata, the latter of which, like Aristotle's 

 Anaima, is open to the objection that it is of a purely 

 negative character. 



